Manufacture of briquet fuel from coal-mine waste of dust-coal.



UNITED sTATEs PATENT oEFIoE.

THOMAS HOUSE AND HERRMANN OOHN, OF LONDON, ENGLAND.

MANUFACTURE OF BRIQUET FUEL FROM COAL-MINE WASTE 0R DUST-COAL.

Specification of Letters Patent.

Patented Dec. 12, 1905.

. 1'0 (0M w/wm, it may concern:

Be it known that we, THOMAS ROUsE, residing at 7 Oldhill street, Stamford Hill, and HERRMANN CoHN, residing at 7 Brunswick Square, St. Pancras, London, in the county of Middlesex, England, British subjects, have invented new and useful Improvements in the Manufacture of BriquetFuel from Coal- Mine Waste or Dust-Coal, of which the following is a specification.

The coal dust or waste is ground to a powder and mixed with the hereinafter-mentioned binding solution, either with or without the addition of a small quantity of iron-furnacefiue cinder or some similar waste product containing silicate-of iron, which is sometimes employed to delay or prolong the period of combustion of the fuel. A binding solution is prepared by mixing with four parts, by measure, of water-glass dissolved in about eighty measures of water, eighty-four measures in all, about one part, by measure, of a petroleum emulsion obtained by levigating caustic lime in petroleum until a cream is z 5 formed, to which cream a modicum of the hypophosphites of lime and soda may be added. The mixture is raised to boiling-point212 Fahrenheitby injecting steam, or in any other suitable way, and is then by such means diluted to a strength which suflices to make the coal-dust particles adhere during molding and pressing into briquet form. The petroleum emulsion causes a skin or glaze to be formed upon the briquets, which is protection THOMAS ROUSE. HERRMANN COHN.

Witnesses THOMAS WILKINs, DAVID J. MOOKRIDGE. 

